Permit Required?
Required
Typical Fee Range
$1,500–$8,000
Impact fees are waived for ADUs under 750 square feet as of 2026.
Fee Method
Valuation-based
What's Required in San Francisco
- Permit required for all Accessory Dwelling Units (ADUs), conversion or new
- Impact fees (park, school, traffic) waived for units under 750 square feet
- Owner-occupancy requirement permanently removed for ADUs and JADUs as of 2026
- Detached ADUs are allowed up to 16–18 feet in height depending on transit proximity
- Minimum 4-foot rear and side yard setbacks required
- Public notice (15 days) required for units using the 'Local ADU Program'
How to Get a ADU Permit in San Francisco
1
Step 1: Program Consultation
Consult a planner to determine if the 'State' or 'Local' ADU program applies.
2
Step 2: Plan Design
Prepare architectural, structural, and Title 24 energy plans.
3
Step 3: PRJ Submittal
Submit a Project Application to SF Planning before building permit filing.
4
Step 4: Fee Payment
Pay building fees and any proportional impact fees for units > 750 sq ft.
5
Step 5: Construction Inspections
Schedule the full sequence: Foundation, Framing, Rough MEP, and Final.
Frequently Asked Questions
Yes, ADUs are allowed on most residential lots; impact fees are waived for units < 750 sq ft.
Building fees start at $1,500; total costs exceed $5,000 for units over 750 sq ft.
No, 2026 state law permanently prohibits owner-occupancy requirements.